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An ALMA survey of s...
An ALMA survey of submillimetre galaxies in the Extended Chandra Deep Field-South: detection of C II at z=4.4
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- Swinbank, A. M. (author)
- Durham University
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- Karim, A. (author)
- Durham University
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- Smail, I. (author)
- Durham University
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- Hodge, J. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Walter, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Bertoldi, F. (author)
- Universität Bonn,University of Bonn
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- Biggs, A. D. (author)
- European Southern Observatory (ESO)
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- De Breuck, C. (author)
- European Southern Observatory (ESO)
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- Chapman, S. C. (author)
- University Of Cambridge
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- Coppin, K. E. K. (author)
- McGill University
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- Cox, P. (author)
- Institut de Radioastronomie Millimétrique (IRAM)
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- Danielson, A. L. R. (author)
- Durham University
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- Dannerbauer, H. (author)
- Universität Wien,University of Vienna
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- Ivison, R. J. (author)
- University of Edinburgh,Royal Observatory
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- Greve, T. R. (author)
- University College London (UCL)
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- Knudsen, Kirsten Kraiberg, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Menten, K. M. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Simpson, J. M. (author)
- Durham University
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- Schinnerer, E. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Wardlow, J. L. (author)
- University of California at Irvine (UCI)
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- Weiss, A. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- van der Werf, P. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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Durham University Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) (creator_code:org_t)
- 2012-11-05
- 2012
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 427:2, s. 1066-1074
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Abstract
Subject headings
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- We present Atacama Large Millimeter Array (ALMA) 870-mu m (345-GHz) observations of two submillimetre galaxies (SMGs) drawn from an ALMA study of the 126 submillimetre sources from the LABOCA Extended Chandra Deep Field-South Survey (LESS). The ALMA data identify the counterparts to these previously unidentified submillimetre sources and serendipitously detect bright emission lines in their spectra which we show are most likely to be [CII] 157.74 mu m emission yielding redshifts of z = 4.42 and 4.44. This blind detection rate within the 7.5-GHz bandpass of ALMA is consistent with the previously derived photometric redshift distribution of SMGs and suggests a modest, but not dominant (less than or similar to 25 per cent), tail of 870-mu m selected SMGs at z greater than or similar to 4. We find that the ratio of L-[CII]/L-FIR in these SMGs is much higher than seen for similarly far-infrared-luminous galaxies at z similar to 0, which is attributed to the more extended gas reservoirs in these high-redshift ultraluminous infrared galaxies (ULIRGs). Indeed, in one system we show that the [C II] emission shows hints of extended emission on greater than or similar to 3 kpc scales. Finally, we use the volume probed by our ALMA survey to show that the bright end of the [CII] luminosity function evolves strongly between z = 0 and similar to 4.4, reflecting the increased interstellar medium cooling in galaxies as a result of their higher star formation rates. These observations demonstrate that even with short integrations, ALMA is able to detect the dominant fine-structure cooling lines from high-redshift ULIRGs, measure their energetics and spatially resolved properties and trace their evolution with redshift.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: starburst
- interstellar-medium
- photodissociation regions
- iso-lws spectroscopy
- galaxies: evolution
- midinfrared counterparts
- micron line
- mu-m
- galaxies: high-redshift
- high-redshift
- deficit
- laboca survey
- star-formation
- ultraluminous infrared galaxies
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
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Swinbank, A. M.
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Karim, A.
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Smail, I.
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Hodge, J.
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Walter, F.
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Bertoldi, F.
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Biggs, A. D.
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De Breuck, C.
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Chapman, S. C.
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Coppin, K. E. K.
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Cox, P.
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Danielson, A. L. ...
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Dannerbauer, H.
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Ivison, R. J.
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Greve, T. R.
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Knudsen, Kirsten ...
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Menten, K. M.
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Simpson, J. M.
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Schinnerer, E.
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Wardlow, J. L.
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Weiss, A.
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van der Werf, P.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Monthly Notices ...
- By the university
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Chalmers University of Technology